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Institute of Foundation Models

K2 Horizon 3.7B

  • Released
  • Open weights
  • Apache 2.0
Intelligence Index

Reasoning setting

15.6#58 of 83measured models
Measured · Artificial Analysis v4.3.2
Context window
524.29K tok

Performance profile

ReasoningRank #78 of 107
69.2%
GPQA Diamond
CodingRank #88 of 94
22.0%
SciCode

Capabilities

Context window

Modalities

Measured setting

Reasoning trade-offs

Source (opens in a new tab)
Intelligence Index v4.3.2
Reasoning
Intelligence Index
15.6

Pricing & access

No API offering listed in our tracked sources.

Run locally

Benchmarks

Full leaderboardSource (opens in a new tab)

Humanity’s Last Exam

Frontier reasoning

K2 Horizon 3.7B · Reasoning#79 of 126

  1. 1Claude Opus 5.5Max61.4%
  2. 2Claude Fable 5.1Max59.1%
  3. 3Gemini 4 ArgonHigh57.1%
  4. 76Gemma 4 12BReasoning15.7%
  5. 77Qwen3.5 9BReasoning14.9%
  6. 78Qwen3.5 Omni PlusStandard14.9%
  7. 79K2 Horizon 3.7BReasoning13.9%
  8. 80Mistral Medium 3.5High13.8%
  9. 81EXAONE 4.5 33BReasoning12.9%
  10. 82Qwen3 Next 80B A3B (Reasoning)Reasoning12.6%

Peers use their best measured result on this benchmark.

Alternatives

Each model at its highest-scoring measured setting · Intelligence Index v4.3.2 and its evaluation cost per task.